I mostly agree, but look at the Technology community. Technology@beehaw.org, Technology@lemmy.ml, Technology@kbin.social, Technology@lemmy.world. They are all about the same thing and subscribing them all gets a lot of dupes.
It would be nice if the welcome page would tell you what community it will be redirecting you too. Right now it looks like something hijacked my browser; I don’t really trust it.
Also, I got error 500 after entering my hostname.
And it might take some effort. But if you had a searchable select box populated with a master list of instances, that might be pretty cool.
In the end, training everyone to make lmmy.to urls when they reference a community may be too difficult. This needs to be a builtin feature of the lemmi web ui somehow.
Just read all the other comments in this post asking for a technical way to merge similar communities. I’m just asking for the same thing.